Sonication time effect towards stability of Al2O3/PAG and SiO2/PAG Nanolubricants / A.A.M. Redhwan..[et al.]

A.A.M., Redhwan and W.H., Azmi and M.Z., Sharif and N.N.M., Zawawi and R., Mamat (2018) Sonication time effect towards stability of Al2O3/PAG and SiO2/PAG Nanolubricants / A.A.M. Redhwan..[et al.]. Journal of Mechanical Engineering (JMechE), 15 (1). pp. 14-27. ISSN 1823-5514 ; 2550-164X


Ultrasonication is the act of applying sound force to agitate particles in a sample with the frequency of more than 20 kHz. It is an external vibration induced during preparation of nanolubricant that helps the particles to overcome the van der Waals force bonding. Nanolubricant prepared is intended to be used in automotive air conditioning (AAC) system to improve its performance. In this work, stability of Al2O3/Polyalkylene glycol (PAG) and SiO2/PAG nanolubricants of 0.2 % volume concentrations with different sonication time were investigated. Five samples for each nanolubricant were prepared by two-step method process with variation of sonication time from zero to two hours’ time with half an hour interval. The stability tests were done by visual sedimentation and UV-vis spectrometer. The optimum sonication time found to be one and half hours and two hours for Al2O3/PAG and SiO2/PAG nanolubricants respectively. Both nanolubricants were found stable for more than two weeks’ period.


Item Type: Article
Email / ID Num.
A.A.M., Redhwan
W.H., Azmi
M.Z., Sharif
N.N.M., Zawawi
R., Mamat
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 1823-5514 ; 2550-164X
Volume: 15
Number: 1
Page Range: pp. 14-27
Keywords: Nanolubricant, Alumina, Silica, Polyalkylene glycol, Sonication
Date: 2018
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